An assessment of the harvest potential of paddlefish stocks in Watts Bar Reservoir, Tennessee

Author

C. Michael Alexander

Date of Award

3-1985

Degree Type

Thesis

Degree Name

Master of Science

Major

Wildlife and Fisheries Science

Major Professor

J. Larry Wilson

Committee Members

David A. Etnier, Douglas C. Peterson

Abstract

Mark-recapture techniques were used during spring 1982 and 1983 to estimate the abundance of harvestable size paddlefish, Polyodon spathula, in Watts Bar Reservoir, Tennessee. Results indicated a harvestable population in 1982 of 3,421 fish (95% confidence interval of 2,184 to 6,665). Aging studies indicated a relatively young population with an abrupt decrease in survival after the ninth year. This was attributed to extreme fishing mortality on these older age classes before July 1980 when Watts Bar Reservoir was closed to net fishing. Estimated annual growth of adult paddlefish was 27.4 mm for males and 31.2 mm for females. Age at maturity was estimated at 5 to 6 years for males and 8 years for females. Males constituted 76% and 60% of the sample in 1982 and 1983, respectively. Ft. Loudoun tail water was identified as the probable spawning area for most Watts Bar Reservoir paddlefish.

Recommended Citation

Alexander, C. Michael, "An assessment of the harvest potential of paddlefish stocks in Watts Bar Reservoir, Tennessee. " Master's Thesis, University of Tennessee, 1985.
https://trace.tennessee.edu/utk_gradthes/7473